Calculating duty: what each role knows and where the gaps cause trouble

Duty rests on what the goods are, what they are worth and where they were made. No single role holds all of that. Engineers know the product, buyers know the true price, suppliers know origin, and the broker files on whatever paper arrives. Errors grow in the gaps.

The engineer knows what the product actually is

Classification turns on material, function and how an item is assembled. The person who designed it knows whether a housing is aluminium or a coated alloy, whether a device measures or controls, and whether a kit is sold as a set or as loose parts. The trade compliance team usually learns this from a part description written for a purchasing system, which is a poor substitute.

Trouble starts when a product changes and nobody tells compliance. A redesign that swaps a component or adds a function can move the item into a different tariff line. The old code keeps getting used because it is already in the item master, and the duty paid quietly drifts away from what is owed.

The buyer knows the price customs never sees

Customs value is the price paid plus certain costs that do not appear on the commercial invoice. Procurement knows about tooling or moulds the company supplied to a factory free of charge. It knows about royalties and licence fees tied to the goods, about rebates agreed at year end, and about price corrections negotiated after delivery.

None of this reaches the broker unless someone sends it. Buyers rarely think of a mould shipped to a supplier as a customs matter. Undeclared assists are among the most common findings in a customs audit, and they are usually discovered long after the entries were filed.

Tax knows the value moves after entry

Where goods come from a related company, the transfer price is set by the tax function. At year end that price is often adjusted to hit a target margin. The adjustment can raise or lower the value of every import across the period.

The tax team sees this as an intercompany accounting entry. It does not always register that declared customs values are now wrong in one direction or the other. If the adjustment goes up, duty is underpaid. If it goes down, a refund may be available but is seldom claimed. Both outcomes depend on someone in tax talking to someone in trade.

The supplier knows where things were really made

Preferential rates under trade agreements depend on origin rules that look at where components came from and how much work was done in each country. Only the supplier knows its own bill of materials. The importer relies on a declaration from that supplier.

Those declarations expire, get issued carelessly, or describe a product the supplier no longer makes the same way. When a claim is challenged, the importer carries the liability, not the supplier. Logistics teams also know things here that compliance may not: a shipment rerouted through a different port, or goods consolidated with stock from another factory, can break the origin story without anyone noticing.

The broker works only from what is handed over

The customs broker knows the filing rules and the current tariff better than almost anyone inside the company. What the broker does not know is the business behind the paperwork. Under pressure to clear goods at the border, a broker will often reuse the last classification for a similar description or accept the invoice value as stated.

This is reasonable behaviour given what the broker can see. It still means the entry reflects the documents, not the facts. Companies that treat the broker as the owner of duty accuracy are usually surprised at audit.

Accounts payable sees the bill, not the basis

Duty often arrives as a disbursement on the broker's invoice or as a deferred account statement. Accounts payable matches it to a shipment and pays. It has no way to judge whether the classification or value behind the amount is right, and it is not expected to.

The finance side does hold one useful fact: where duty is booked. If it sits in a general freight or expense account instead of landed inventory cost, product margins are misstated and refunds on returned or re-exported goods are easy to miss. Nobody upstream sees that consequence.

Questions to ask the people who run it

The documented process tends to describe how duty should be calculated. The people doing the work can explain how it is actually done.

• When an engineering change is released, who tells the classification team, and how?
• Does anyone in procurement know what an assist is? Where are free-issue tools and moulds recorded?
• When a transfer pricing adjustment is booked, who decides whether customs values need correcting?
• Who checks that supplier origin declarations are current before a preferential rate is claimed?
• What does the broker do when a part number is new or the description is vague?
• Has the broker ever been asked to change a classification, and who approved it?
• Where is duty posted in the ledger, and who reconciles it to entries filed?
• When goods are returned or exported again, does anyone look for duty to recover?
• Which past audit finding still has not been fully fixed?

The answers usually show that each person is doing their part correctly. The faults sit between them, in the handoffs nobody owns.

APQC's Process Classification Framework® (PCF) is an open standard developed by APQC, a nonprofit that promotes benchmarking and best practices worldwide. To download the full PCF or to view definitions and measures, please visit www.apqc.org/pcf.